You have an Exchange Server 2010 Mailbox server.You need to identify which users have the largest mailboxes on the server.What should you do？（）

• A、Run the Get-MailBoxStatistics cmdlet.
• B、Run the Get-StoreUsageStatistics cmdlet.
• C、Add the MSExchangeIS Client performance counters to the Performance Monitor.
• D、Add the MSExchangeIS Mailbox performance counters to the Performance Monitor.